Swansea have been warned they cannot afford to sell Everton target Gylfi Sigurdsson at any price this summer.

The Blues are keen to bring the Iceland midfielder to Goodison Park, and are ready to pay a club-record fee in order to do so.

Sigurdsson pulled out of Swansea's pre-season trip to the USA claiming he was not in the right frame of mind to feature, and Everton are eager to complete a deal for the 27-year-old as soon as possible.

Former Wales striker John Hartson, though, has urged Swansea not to sell the attacking midfielder.